Coupler for pet food bowls



FIG. 1 is a top view of a coupler for pet food bowls showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom view thereof; and

FIG. 4 is a side elevational view thereof. 

The ornamental design for a coupler for pet food bowls, as shown and described. 